Abstract: A touch-operated switch for electrical apparatus which includes a power connection to the apparatus, a serially connected power socket in the connection provided with a pair of terminal jacks each in the form of make-before-break electrical contacts, a plug-in module containing an electronic circuitry including a solid state power switch, two terminal means on the module for plugging into said terminal jacks, one of said terminal means comprising a pair of electrically discrete pins engaging with respective ones of the electrical contacts of one of said terminal jacks to make electrical connection therewith while opening said contacts, said pins being connected across said power switch, an energizing circuit for the electronic circuitry connected between both said terminal means, and a touch-sensitive control circuit in said electronic circuitry for controlling the operation of said power switch.